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0. H. HERTEL FURNACE.

APPLICATION FILED SEPT I I. IQIB.

Patented June 10, 1919.

UNITED ,Tns-

OTTO H. HERTEL, or GLENELLYN, ILLINOIS, ASSIGNOR To CONSUMERS COMPANY, OF

, CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

FURNACE.

Specification of Letters Patent.

Patented June 10;, 1919.-

Application filed. September 11, 1918. Seria1No.253,493.

particularly adaptable for locomotives, the" object of the invention being to provide improved construction for causing smokeless combustion and for increasing the steam producing efficiency.

On the accompanying drawings my improved construction and arrangement is clearly shown. On the drawing Figure 1 is a vertical diametral section of the rear end of a locomotive boiler,

Fig. 2 is a sectional View on plane 22, Fig. 1, and

Fig. 3 is a fragmentary view in vertical section showing a modified arrangement.

A represents an arch structure extending transversely across the combustion space of the boiler to divide it into a-coking chamber 5 and a combustion chamber 6. In Fi 1 the arch structure comprises the hollow body 7 of sheet metal which at its ends is connected with the water legs 8 and 9 by connections 10 and 11. The space between the top of the hollow combustion space is filled in by brick-work or other material 12. The arch structure extends within a short distance of the grate 13 and preferably to or below the normal level of the fuel Extending downwardly through the arch structure are the passageways or pipes 14 which at their upper ends Open into the coking zone 5 and at their lower ends are open to the combustion zone 6. Through these passageways gases, soot and other products resulting from coking flow from the coking zone into'the combustion zone 6 above the burning coke 0 where they are consumed. Gases also pass underneath the arch structure from the coking zone to the combustion zone, all smoke, soot and gases being then thoroughly consumed before the smoke-stack is reached.

To cause better circulation of water through the arch and also to increase the boiler area tubes 15 connect between the lower end of the hollow arch body 7 and the rear leg 16 of the boiler. These tubes can be readily inserted and secured by suitable arch and the roof of the tools applied through openings 17 and 18 for which removable plugs 19 and 20 are provlded. In Fig. 1 the tubes connect with the hollow arch below the outlet ends of the passageways 14 and on the rear ends of the tubes are supported tile or fire-brick plates 21 for deflecting the heat from the burning coke c forwardly so as to assure combustion of the'smoke, soot or gases issuing from the passageways 14. These tubes being close to the burning coke are highly heated and thus add greatly to the steam generating capacity and efliciency of the boiler.

I11 Fig. 3 is shown a modified arrange ment, the hollow arch 22 having the transverse passageways 23 therethrough near its lower end, these passageways being in practice above the normal level of fuel in thezone 5 so that gases, smoke and soot coking above the coal may escape into the combustion zone. The pipes 24 connect with the arch above the passageways 23 and on the pipes bafiie or deflecting tile or plates 25 are laid adjacent the arch and above the passageways 23 for deflecting the gases, soot and smoke into the hot part of the zone 6 and to prevent escape thereof through the boiler flues 26 before they are consmned.

The green coal is inserted through the door 27, in sufficient amount to extend above the bottom of the arch and the coal is ignited. After a while the coal near the grate will be coked and it is then shoved rearwardly below the arch and into the combustion zone 6 where the coke burns to generate intense heat which circles around the pipes 15 or 24. The gases driven upwardly from the coal in the zone 5 find outlet to the combustion zone through the passageways 1 1 where they meet the intense heat and are entirely consumed. The arch is also highly heated and the arch heating surface together with that of the pipes 15 or 24 adds greatly to the capacity of the boiler and steam is quickly generated after the furnace is ignited. Furthermore, all gases, smoke and soot are entirely consumed before the smoke stack is reached. 28 is a dumping grate below the combustion zone by means of which clinkers and ashes can be dumped into the ash pit 29. The arch structure and the pipes connecting its lower end with the boller body can be readily installed in existing types of furnaces without requiring reconstruction thereof.

' a front coking zone and a rear combustion I do not desire to be limited to the exact construction and arrangement shown and described as'changes and modifications could-: no doubt be made-which would'stillcome within the scope of the invention. I claim as follows:

The combination with a furnace having a combustion chamber, a boiler and water legs connected therewith forming the side walls. of said combustion chamber, of" a hollow arch connected at its sides with saidwater legs for the flow of water and extending from the top of said combustion chamber downwardly to the normal fuel level, said arch dividing said combustion chamber into Copies of this patent may be obtained for five cents zone, pipes extending across the combustion causing thorough mixture oftheheated gases of saidcombustion zone with the gases and carbon emerging from said passageways. 7 j

In witness whereof; I hereuntosubscribe my namethis 5th day "of September, A. D. 1918.

OTTO H. HERTEI i.

each, by addressing the Commissioner of Patents.

Washington, D. G. 

